Thermal fluid mixing valve



April 18, 1939. E. R. SNAVELY THERMAL FLUID MIXING VALVE Filed May 10, 1935 INVENTOR.

Patented Apr. 18, 1939 2,155,154

UNIT-ED STATES PATENT OFFICE THERMAL FLUID MIXING VALVE Earl R. Snavely, Riverview, R. I., assignor to Evelyn L. Snavely, Newark, N. J.

Application May 10, 1935, Serial No. 20,772

Claims. (Cl. 236-12) This invention relates to a thermal fluid mixthimbles 34 and 35 are located for supporting a ing valve; and has for one of its objects the cylindrical tube 36 by means of the conical enprovision of a valve for mixing hot and cold gaging surfaces 37 on the end of the tube and liquids, primarily water, for the obtaining of a 38 on the ends of the thimbles 34 and 35. These 5 supply of water which is of a fairly constant thimbles are accessible thru plugs 39 and 40 also 5 temperature. in axial alignment with the thimblesand thru Another object of the invention is the simpliwhich entrance may be gained by the passages fication of the casing casting which houses the 28 and 23. In this manner the entrance fluid moving parts and which is shaped to cooperate of diiferent temperatures is received in the ends therewith. of the conduits 32 and 33,. which entrance is 10 Another object of the invention is the provision distant from the mixing chamber 21 and this of a valve having pipe lines which are connected fluid is conveyed inwardly in opposite directions thereto for the inflow of liquids having two towards each other. A dividing wall 42 prevents different temperatures and an outflow of the rethe mixing of the fluid of different temperatures sultant thereof, the arrangement being such that within the tube 36, while the openings 43 and 44 15 there is accessibility to the moving parts withpermit the fluid to be discharged thru the ports out disconnection of the inflow and outflow com or openings provided in the side walls of the duits for these admixed liquids. tube 36.

Another object of the invention is the pro- In order to control these discharge openings vision of a simple construction and a balanced or ports, Ihave provided a valve means compris- 20 relation flow of fluid, whereby an inexpensive and ing a rotary cylindrical member 45 which is yet eflicient'and well working mixing valve can provided with diametrically opposite openings be had. 46 and 41 which in certain positions of rotation Another object of the invention is to conduct register with either the opening 43 or 44 in the liquids of diiierent temperatures toward each tube 36. The arrangement of these openings is 25 other with a single moving unit controlling the such that when the openings 44 and 41 arein opening area thru which the fluid passes in both registry the openings 43 and 46 will be out of of the conduits. registry and closed and conversely when the Another object of the invention is the utilizaopenings 43 and 46 are in registry the openings tion of standard tubular parts of such sizes that 44 and 47 will be out of registry and closed- The 30 they will fit suificiently close one with the other arrangement of these openings is such that as so that the minimum operations of machine or one pair of openings are gradually brought into tools need be performed in the formation of these registry the other pair of openings move different parts of the constructi n. gradually out of registry so that the movement With these and other objects in view, the ininversely controls the flow area. 35 vention consists of certain novel features of con- The two cylinders which form the valve means struction. as will be more fully described, and are connected together by a bridge 50 with posts particularly pointed out in the appended claims. 5| extending thru slots 52 in the tube 36 and In the accompanying drawing: threaded into the members 45. This bridge is Fig. 1 is a sectional view somewhat diagramengaged by a pendulum arm 53 of the thermo- 40 matic of a casing and the working parts therein; static bi-metal which is spirally arranged as at Fig. 2 is a sectional view on substantially line 54 and mounted upon a shaft 55 supported in 2-2 of Fig. 1; the casing 56 having a hollow portion 5'! to com- Fig. 3 is a sectional view on line 33 of Fig. l; plete the mixing chamber of the device. This and arm 53 may be rotated by means of the slotted 45 Fig. 4 is a sectional view on line 4-4 of Fig. 1. end 58 for adjustment of the spiral coil which With reference to the drawing, and more causes different thermostatic temperatures to be particularly to Fig. 1, 26 designates the base of maintained in the mixing chamber. This mixing the casing, which is provided with a hollow chamberis discharged thru the passage 59 formed portion 21 forming a part of the mixing chamby a balile plate 63 and openings 60 thru the part 50 her; while there are lead-in passages 28 and 29 6! to which a pipe may be permanently coninto which hot and cold water supply pipes may nected for this purpose. be threaded as at 30 and 3|. These conduits 28 The arrangement of this casing is such that and 29 are usually at right angles to the axially by removal of the top 56 the plugs 39 and 40 and aligned conduits 32 and 33 in which mounting thimbles 34 and 35, the entire mechanism can u be removed from the casing without disturbance of the pipe line connected at 30, 3| and 60 for supplying water to or taking water from the thermostatic valve. Of course, suitable bolts 62 may be used for holding the parts together.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the vprivilege of resorting to all the mechanical changes to which the device is susceptible, the invention being deflned and limited only by the terms of the appended claims.

I claim: a

1. In a thermal fluid mixing valve, a casing having a mixing chamber, a tube in said casing having'o penings at its opposite ends and an imperiorate plug between its ends forming two difierent conduits for diflerent temperature liquids, ports thru the side of said tube in each conduit communicatingwith said chamber for discharge of liquid into said chamber, tandem valve means fitting within said tube, one being arranged in each conduit thereof, said valve means being rotatably movable in unison relative to said conduits to inversely vary the flow therethru, and thermostatic means in said mixing chamber and having its free end connected to said valve means outside of said conduits and arranged for movement thereabout for moving said valve means in response to changes in fluid temperatures.

2. In a thermal fluid mixing valve, a casing having in one portion a mixing chamber and in another portion axially aligned conduits for different temperature liquids with receiving openings distal from said chamber and discharging into said chamber, a dividing wall in said conduits comprising an imperforate central plug,

valve means in said conduits comprising sleeve portions extending in opposite directions from said plug with ports in said sleeve portions, and thermostatic means for moving said valve means to position said ports at diiferent relative positions with reference to said conduits to control the openings thru said ports.

3. In a thermal fluid mixing valve, a casing having in one portion a mixing chamber and in another portion axially aligned conduits for different temperature liquids with receiving openings distal from said chamber and discharge ports and discharging into said chamber, a dividing wall in said conduits comprising an imperforate central plug, rotatable valve means in said conduits comprising sleeve portions extending in opposite directions from said plug with ports in said sleeve portions, and thermostatic means for rotatably moving said valve means to position said valve ports at different relative positions with reference to said discharge ports to control the discharge of said liquid.

4. In a thermal fluid mixing valve, a casing having a mixing chamber therein, two axially aligned conduits for different temperature liquids having receiving openings distal from said chamber and discharge openings into said chamber, an imperforate dividing wall separating said conduits, unit valve means comprising two valve sleeves fitting within and extending along said conduits in opposite directions from said wall and rotatable relative to the conduits for inversely controlling the flow through said conduits, ports in said valve sleeves, means disposed at opposite sides of said dividing wall connecting said valve sleeves together for operating the same in unison, and thermostatic means in said chamber connected to said valve sleeve connecting means outside of said conduits and arranged for movement thereabout for moving said valve con necting means and said valve sleeves in response to changes in fluid temperatures.

5. In a thermalv fluid mixing valve, a casing having a mixing chamber, a tube in said casing supported at its ends and extending across said mixing chamber, said tube having openings at its opposite ends and a continuous bore therethrough, a dividing wall in said bore consisting of a-plug between the ends of the bore forming different conduits within said tube for different temperature liquids, ports through the side of said tube in each conduit communicating with said chamber for discharge of liquid into said chamber, valve means fltting within each of said conduit portions of said tube and movable relative thereto for controlling said conduits to inversely vary the flow therethrough, means external of said tube extending interiorily thereof adapted for rotary movement about the axis of the tube through openings in the side of the tube connecting together said valve means in each of said conduits for movement in unison, and thermostatic means in said mixing chamber offset from the axis of said valve means for moving said valve means and said connector means therefor in response to changes in fluid temperatures.

EARL R. SNAVELY. 

